<template>
  <view>
    <!-- 搜索了栏 -->
    <view class="search-box">
      <uni-search-bar :radius="100" @input="input" cancelButton='none'></uni-search-bar>
    </view>
    <!-- 搜索列表 -->
    <view class="sugg-list" v-if="searchResults.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
        <view class="goods-name">{{item.goods_name}}</view>
        
      </view>
    </view>
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="16" @click="clean"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list">
        <uni-tag :text="item" size="normal" v-for="(item,i) in histories " :key="i" @click="gotoGoodList(item)"></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        // 延时器
        timer:null,
        // 搜索关键词
        kw:'',
        // 搜索结果列表
        searchResults:[],
        // 搜索历史
        historyList:[]
      };
    },
    methods:{
      // 获取用户输入的
      input(e){
        // 清除对应的延时器
        clearTimeout(this.timer)
        // 重新启用一个延时器
        this.timer = setTimeout(()=>{
          this.kw =e
          // console.log(this.kw)
          this.getSearchList()
        },500)
      },
      async getSearchList(){
        // 搜索为空,列表为空
        if (this.kw === '') {
          this.searchResults = []
          return
        }
        // { query:this.kw}锁定关键词
        const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{ query:this.kw})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchResults = res.message
        // console.log(res);
        // 调用方法
        this.saveHistory()
      },
      gotoDetail(item){
        console.log(item.goods_id);
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      // 保存搜索历史记录
      saveHistory(){
      //   this.historyList.push(this.kw)
      
      const set = new Set(this.historyList)
      
      set.delete(this.kw)
      set.add(this.kw)
      
      this.historyList = Array.from(set)
      // console.log(set);
      uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      clean(){
        this.historyList=[]
        uni.setStorageSync('kw','[]')
      },
      // 跳转界面
      gotoGoodList(kw){
       // console.log(kw);
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query='+ kw
        })
      }
    },
    onLoad(){
      this.historyList =JSON.parse(uni.setStorageSync('kw')||'[]')
    },
   
    // 计算属性
    computed:{
      histories(){
        // 展开运算符
        return [...this.historyList].reverse()
      }
    }
    
    
  }
</script>

<style lang="scss">
.search-box{
  position: static;
  top: 0;
  z-index: 999;
}
.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0 ;
    border-bottom: 1px solid #efefef;
    .goods-name {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}
.history-box{
  padding: 0 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }
  .history-list{
    display: flex;
    flex-wrap: wrap;
    
    uni-tag{
      margin-top: 5px;
      margin-right: 5px;
      font-size: 15px
    }
  }
}
</style>
